AMOS 6 - Falcon 9-029 - Канаверал SLC-40 - 3-4 сентября 2016

Автор Salo, 27.07.2016 15:01:20

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Georgea

#3960
В последнем апдейте по-прежнему говорится про возгорание. Не пойму, таки взорвался карбон в кислороде или нет?   :oops:

Взрыв, который мы видели - это взрыв карбона, или карбон лишь повредил баллон и дальше всё развивалось из-за избытка давления гелия?

Зловредный

#3961
https://forum.nasaspaceflight.com/index.php?topic=41252.msg1627988#msg1627988

ЦитироватьWe know SpaceX have returned to using four COPVs. Does anyone recall when they first moved to three?

https://forum.nasaspaceflight.com/index.php?topic=41252.msg1628164#msg1628164

ЦитироватьI found from webcast video that three COPVs were first at F9-016 with ABS-3A/Eutelsat 115 West B. Previous flights had four vessels.
Гробос-Фунт

LRV_75

Ну вот скорее всего  - изменение конфигурации COPV - это они на оставшихся "ТРЕХ-баллонных COPV" ракетах будут аккуратней заправку проводить, более теплым гелием и медленнее чем 1-го сентября,
А изменение конструкции COPV - это на вновь изготовляемых ракетах 4-й COPV вернут взад.

Вот и весь расклад, имхо
Главное не наличие проблем, главное способность их решать.
У каждой ошибки есть Имя и Фамилия


Штуцер

ЦитироватьSalo пишет:
http://www.planetary.org/blogs/jason-davis/2017/20160110-spacex-rtf-redux.html
ЦитироватьLindy told me she thought the explanation was credible—it doesn't take much to start a catastrophic conflagration in a liquid oxygen environment.
Стр 167
ЦитироватьШтуцер пишет:
ЦитироватьSpaceX Falcon 9 считает сбой был вызван, когда композит над обернутой сосуда высокого давления (COPv или гелия бутылка) "отпустить" в жидкий кислород (LOX) бак;
Надо ли полагать, что рабочего давления гелия в COPv еще не было?
Может, LOX каким то образом воспламенил углерод композита?
Но в виде обломков различных ракет
Останутся наши следы!

ronatu

#3965
According to SpaceX, supercool liquid oxygen may have seeped into the gaps that formed between the two liners. Helium doesn't liquify until -269 degrees Celsius - just four degrees warmer than absolute zero.
That means the gaseous helium inside the COPV could have chilled the liquid oxygen trapped in the liner gaps even further - enough to solidify it, which occurs at -219 degrees Celsius.

At that point, SpaceX believes either friction or the snapping of a carbon fiber strand near the gap started the explosion that destroyed the rocket.

Lindy told me she thought the explanation was credible - it doesn't take much to start a catastrophic conflagration in a liquid oxygen environment. And SpaceX said tests showed the colder the oxygen, the more likely this scenario was to occur.

"I think the general concept is feasible," she said.
"The explanation, for me, is a bit simplistic, but an engineer is always going to say that."
Когда жизнь экзаменует - первыми сдают нервы.

ronatu

Когда жизнь экзаменует - первыми сдают нервы.


Apollo13

https://www.spaceintelreport.com/iai-amos-6-failure-sent-message-israeli-government-satellite-autonomy/

ЦитироватьSpacecom's IAI-built Amos-6 was destroyed Sept. 1 when its Falcon 9 rocket, on the launch pad to prepare for a static firing. The wisdom of placing a satellite on the rocket for the test firing, which saves time and money in the launch-preparation process, has been much debated in the industry since the explosion.
It was IAI, and not Spacecom, that carried the insurance policy. Spacecom's policy would be triggered on intentional ignition of the rocket in a launch attempt.
Weiss said IAI understood the difficulties on Spacecom imposed by the failure and that IAI paid Spacecom its share of the insurance proceeds.
Again because it was not a launch attempt, the explosion was not considered a launch failure, meaning Spacecom did not collect an insurance payments under its launch-plus-one-year policy.
Industry officials said it also meant that Spacecom did not recover its $50 million in payments to SpaceX.
Spacecom was an early customer for SpaceX with Amos-6, and paid about $50 million for the launch. Since then, SpaceX prices have risen with the company's new-version Falcon 9 Full Thrust version, and are now around $65 million for a standard telecommunications satellite heading to geostationary-transfer orbit.
Despite what would appear to be a strong incentive — with $50 million sitting in SpaceX's account — Spacecom has not announced a launch provider for Amos-17. The satellite is scheduled for launch in 2019.